Telangana PSC Group 4 Secretarial Ability 2018 Paper 2

Question : 80 of 150

Marks: +1, -0

A, B and C are running in same direction around a circular playground and all the three are started from same point. If A, B and C complete one round of running in 42, 68 and 126 seconds respectively, when do they meet again at the starting point?